Camlab Lovibond MD 610, Инструкция по эксплуатации

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MD 610_2d 11/2019
Notes:
1. When testing chlorinated water the residual chlorine contents can influence the colour
reaction of the liquid reagent. Thiscan be avoided (without interfering with the pH
measurement) by adding a small crystal of Sodiumthiosulfate (Na
2
S
2
O
3
· 5 H
2
O) to the
sample before adding the PHENOLREDsolution. PHENOLREDtablets already contain
Thiosulfate.
2. Due to differing drop sizesresults can show a discrepancy in accuracy by comparison
with tablets. This can be minimised by using a pipette (0.18 ml PHENOLREDsolution is
equivalent to 6 drops).
3. After use replace the bottle cap securely.
4. Store the reagent in a cool, dry place ideally between 6°C and 10°C.
5. Salt error
For higher salt concentrations the measurement valueshave to be adjusted as follows:
Salt content 30 g/l (seawater) 60 g/l 120 g/l 180 g/l
Correction - 0,15 1) - 0,21 2) - 0,26 2) - 0,29 2)
1)
according to Kolthoff (1922)
2) according to Parsonund Douglas (1926)
Reagent Form of reagent/Quantity Order-No.
PHENOLRED solution Liquid reagent / 15 ml 471040